Method for receiving and transmitting signals



Apn'l 23, 1940.

Filed .my 1e, 1937 3 Sheets-Sheet l W Y in@ @q a {.N A

April 23, 1940. F. KLEMENT 2,197,867

THQD FOR RECEIVI'G AND TRNSIITTIG SIGNLS Filed July 16, 1937 3Sheets-Sheet 2 April 23, 1940. F, KLEMENT 2,197,867

METHOD FOR RECEIVING AND TRANSMITTING SIGNALS Filed July 16, 1937 3Sheets-Sheet 3 l l a 6 221 222 w my M F1 gf Patented Apr. 23, 1940UNITED STATES PATENT OFFICE METHOD FOR RECEIVING AND TRANS- MITTINGSIGNALS Franz Klement, Hohenneuendorf, near Berlin, Germany, assgnor toSiemens & Halske, Aktiengesellschaft, Siemensstadt, near Berlin,Germany, a corporation of Germany Application July 16, 1937, Serial No.154,060 In Germany July 16, 1936 19 Claims. (Cl. 178-39) My inventionrelates to an arrangement for receiving and transmitting signals, forinstance, telegraph impulse combinations by means of air, gas `orliquids.

Telegraph receiving apparatus are known in which the electric impulsestransmitted over the long-distance circuit are converted into compressedair impulses and supplied to a selecting mechanism by means of a rotaryair distributor. In this case the compressed air impulses produced bythe receiving relay, control the selecting devices in accordance withlthe received impulse combinations. The known arrangements of theabove-indicated character have, however, the disadvantage in that theyrequire complicated translating devices which are very difcult tomanufacture.

According to the present invention an arrangement for transmittingsignals by compressed air and/or suction air is employed in which theair impulses produced in a known manner by the receiving relay andtransmitted to a distributor are utilized in the manner that a sum or adifference is formed of the impulses or of magnitudes (path, pressure,quantity) allotted to the same. The device may be operated instead ofwith air also with any other gas or with a liquid medium; for instance,oil without departing from the spirit of the invention.

The use of mechanical translators in connection with the telegraphapparatus is well known in which the impulses are utilized by formingsums or differences. However, such arrangements operate in the mannerthat a plurality of discs or gears are displaced with respect to oneanother. In the case of great line speeds required lin modern telegraphygreat difficulties arise in such mechanical translators owing to theconsiderable friction and mass of the numerous moved parts and owing tothe numerous inexact engagements. These drawbacks are removed accordingto the invention insofar as a piston actuated by air or the like may beconsiderably accelerted, even at low pressures. Within reasonable limitsthe stroke of the piston may be chosen at will and nally a movement maybe effected in both directions by the use of suction air or compressedair for current and no-current impulses or for positive and negativeimpulses. The sums or the differences of some or of all impulses of atelegraph impulse combination may also be formed by the displacement ofrotary pistons which may be arranged to rotate in a cylinder.

In order to attain an exact mid-point scanning the impulses of thegaseous or liquid medium act according to the invention on the selectingand adjusting devices only in their midpoint.

In the simplest case the mid-point scanning may be attained bycorrespondingly designing the air distributor or the slide valve. Tothis end. the air channels in the distributor are made as narrow aspossible. In this case, the air acts on the selecting and adjustingdevices only during a short time which corresponds to the mid-point ofthe electric impulse. In order to supply the necessary amount of air tothe last-mentioned devices also a considerably higher air pressure is,therefore, necessary in carrying out the method under consideration.

According to the invention the control member common to all impulses andcontrolled by the receiving magnet is employed for the mid-pointscanning. It is very essential that the movement be caused by compressedor suction air, even if no mid-point scanning is performed. It is ofgreat advantage, if the receiving magnet of the telegraph apparatus isrelieved in the manner that for every impulse the armature engages oncethe magnet.

According to the invention particular control distributors mounted on ashaft preferably together with the operating distributor for theadjusting device and driven in common are employed in connection withthe control.

Further, it has been found that it is advantageous to effect the controlwith the aid of valves, since in this manner the moved masses of thecontrol member become very small.

Further details of my invention will be apparent from the followingdescription taken in connection with the accompanying drawings in whichFigs. i shows an embodiment of the invention in which the impulsescoming from the distributor are transmitted to a slide piston.irrangement.

Figs. 2 and 3 show another form of the invention in which a rotation iseffected which is preferably transmitted to a type wheel.

Fig. 4 shows a view of a rotary piston and Fig. 5 shows a sectional Viewthereof.

In Fig. 6 is schematically shown the manner in which a distributor witha rotary piston according to the invention may cooperate with atranslator having a slide piston as shown in Flg. 1, and

Figs. 7 and 9 show another form of the invention in which the control ofthe distributors is effected by a valve.

In Fig. 1, A designates a cylinder in which are arranged ve pistons I to5. The pistons are slidably coupled with one another and with thecylinder by means of rods I6, as shown in the sectioned portion ofpiston 4. These rods are of varying lengths to limit the movement of thepistons with respect to one another so that the piston I may bedisplaced by one spacing unit with respect to the cylinder, the piston 2by two units with respect to piston I, the piston 3 by four units withrespect to piston 2, the piston 4 by eight units with respect to piston3, and the piston 5 by sixteen units with respect to piston 4. Thepistons are shifted apart with respect to one another by introducingcompressed air into the intermediate spaces, whereas the pistons may becaused to approach one another by withdrawing with the aid of a vacuumthe compressed air from said intermediate spaces. In other words, thepistons may be moved in one or the other direction by applying positiveor negative fluid pressure. This may be also attained by a compressionspring F. Preferably suction air and a compression spring are utilizedin accelerating the adjustment. The movement of the piston 5 istransmitted to a type wheel B or any other recording device, forinstance, through a rack Z.

In each position of the pistons the corresponding intermediate spacesmust communicate with the respective air conduits. The latter enter,therefore, the ports g which have a corresponding length in axialdirection. This may also be effected in another manner; for instance, byproviding, as shown, bevelled portions at the ends of the pistons, whichalso may cooperate with the extended ports.

The arrangement operates as follows: 'I'he receiving magnet M at rest,i. e. in normal oondition, is traversed by a current and thus firmlyholds the armature 6. The three-armed ratchet lever 8 pivotally mountedas indicated at 1 is ccnnected with armature 6 and arrests with its arm8 by means of the locking nose 9 cam disc C fixed on the receiver shaftI0 which latter is driven through a sliding coupling (not shown) so thatit will rotate whenever released by arm 8'. On the receiver shaft I0 arefurther fixed the rotor D of the distributor valve D and the printingcam disc E. The starting impulse deenergizes magnet M and causes thearmature to fall away, thus releasing the receiver shaft I0 which beginsto rotate in clockwise direction. After each 1/7 rotation the armature 6is momentarily pressed against the magnet by means of the cams I I whichengage arm 0" and rock it counterclockwise so that thereby the armature6 is rmly held or released by the magnet M after the passage of a cam,depending upon whether or not a current impulse is present at thatmoment. To the ar- `lnature6 is, furthermore, connected the slide valve*L The latter connects the port I2 of the valve rotor D with thecompressed air conduit G when the armature is attracted or with thevacuum conduit J when the armature is released. The ports I3 in thestationary part of the distributor D are of such peripheral widths thatthey register with the port I2 only during a fractional portion of theimpulse. In this manner the impulses are scanned as regards time in themid-point of the time period so that a correction or the propertranslation even of distorted impulses is attained. 'I'he conduits I4leading to the translator are connected to the ports I3. After the fiveimpulses are scanned the cam E presses the pressure hammer K against thetype wheel. The cam I5 of the cam disc C presses the armature 6 againstthe magnet. This cam has a larger peripheral extent than the cams and itthus rmly holds the armature for a longer time against the magnet uponthe arrival of a locking impulse. This cam I5 is so positioned thatduring its operation locking nose 9 engages arm 8 of the ratchet lever 8so that the receiver shaft comes to rest.

While Fig. 1 shows an embodiment of the invention in which slide pistonsare employed for operating the type drum, Figs. 2 and 3 employ radialvanes or blades for that purpose.

In Figs. 2 and 3 is shown a cylinder |0I closed by end plates not shown.Five sector-shaped blades (rotary pistons |03 to |01) are arrangedwithin this cylinder and are capable of being rotated about a stationaryshaft |02. Each of these rotary pistons, of which |05 is shown in detailin Figs. 4 and 5, is mounted on a ring |03 to |01 respectively. Therotary pistons may, therefore, be rotatably moved on shaft |02independently of one another. The movement of the blades |03 to |01 withrespect to one another and that with respect to the front end plate ofthe cylinder are limited by an arcuate groove |08 in which engages a pinnot shown which is arranged in the adjacent blade or in the case of therotary piston |03 in the front end plate of the cylinder. Besides therotary pistons also a further blade |09 is arranged within the cylinderhaving the same form as the rotary pistons and being firmly secured tothe cylinder wall I0 I. The lower end of the blade |09 extends closelyto the rings |03 to |01. The grooves |08 are so dimensioned that therotary piston |03 may be moved With respect to the blade |09 by one arcunit, the piston |04 with respect to |03 by two units, the piston |05with respect to |04 by four units, the piston |06 with respect to |05 byeight units and the piston |01 with respect to |06 by sixteen units. Thering |01 allotted to the piston |01 is axially extended and passesthrough the front end plate of the cylinder. The part to be adjusted bythe impulse combination-in the case of the type printing telegraphs thetype wheelis secured to the ring |01. When spacing the type wheel it isto be considered that the piston |01 does not describe a complete circlebut only an arc whose magnitude amounts to 36W-6a where a is the angletaken up by a piston.

In the case of the five-unit code the compressed air and suction air issupplied through ve longitudinal ducts |03" to |01" arranged in theshaft |0I, each of the ducts extending to an opening I0 in one of thefive blades.

As will be seen from Figs. 4 and 5 the ducts end rst in a groove of theshaft |02, whence the air passes through a bore ||2 into theabovementioned outlet opening ||0. The space between the rotary piston|01 and the stationary blade |09 is brought in the present case undernormal pressure by an opening ||3, i. e., it communicates with theoutside atmosphere.

Similarly to the manner shown in Fig. 1, the individual rotary pistonsreceive the impulses of the gaseous or liquid medium frfom a receivingmagnet system through a revolving distributor and assume correspondingpositions. As in the case of Fig. 1 sums or differences from whichresults a corresponding position of the type wheel are formed of therelative movements of the in- 75 dividual rotary systems. Instead of therevolving distributors slide pistons may also be employed for thecontrol.

Fig. 6 shows an arrangement which serves to control a multi-row typewheel 1 14. For the control of this type wheel all together 114 rotaryand sliding movements are necessary. In this case the control of thelongitudinal displacement of the type wheel is effected by a singleimpulse of an impulse combination. whereas the rotary mottion iscontrolled by the other portion of the impulse combination. 'I'helongitudinal displacement is preferably brought about in a slide pistonsystem 115 of the type shown at A in Fig. 1, whereas the type wheel isrotated by a rotary piston system 116 which is designed substantially asshown in Figs. 2 to 5. The slide piston system of the cylinder I 15 isprovided with a connecting shaft 111 which passes through the hollowshaft of the rotary piston system 116. The end ring 119 of the endpiston projects from the cylinder 116 of the rotary piston system. Tothe end ring 119 are secured two driving pins 118 along which the typewheel 113 may be shifted. These driving pins I 18 control, therefore,the rotation of the type wheel 114.

The transmission of the 32 combinations of the five-unit code requires,therefore, ve pistons; for instance, two rotary pistons and three slidepistons. For the letter-figure-shift preferably a further piston isarranged which moves the type wheel into the position corresponding tothe desired type group. This piston may be either of the rotary or ofthe sliding type. The distribution of the 32 characters of each typegroup over four rings of the type wheel results, therefore, in aneight-row type drum which is adjusted to four rings each in the case ofa letter-flgure-shift. Also a six-unit code may be employed and the typegroup changeover may be brought about by the sixth impulse.

In this form of the invention two translating devices are. therefore,provided as mentioned in the introduction. If the arrangement operatesin such a manner that a sliding motion of the type wheel is broughtabout, for instance by the rst and last impulse, and a rotary motion bythe other impulses, for instance by the second to the fourth impulse,the piston corresponding to the first impulse has time to reach its endposition until the third impulse is utilized. On the other hand, alsothe pistons corresponding to the second to fourth impulse need onlyattain their end position at the end of the fth impulse in order toeffect a proper print of the chosen character.

Figs. 7 and 8 show the control of a piston arrangement by means of avalve which is controlled by the receiving magnet.

In the operating cylinder 201 are arranged five pistons, for instance inthe manner shown in Fig. l, which adjust through a rack bar rod 202 anda gear 203 a type wheel 204 in accordance with the air impulses conveyedfrom the distributor 210 through the ducts 205 to 209. The adjustment ofthe type wheel is thus effected in the same manner as shown in Fig. 1.

Positive or negative air pressure is supplied according to the signs orwith the aid of the control port 211 in piston valve 214 from theconduits 212 and 213 to the distributor 210 by a pressure generator notshown. The movement of the piston valve 214 designed in the form of aslide valve depends on the one hand upon the state of excitation of thereceiving magnet 215 whose armature 216 is rmly connected to the piston214 through the rod 211. The piston 214 communicates with two controldistributors 22| and 222 through the conduits 216, 219 and 220, thedistributor 222 being continuously under the influence of suction air ornegative pressure and the distributor 221 being continuously suppliedwith compressed air. To simplify the construction of the arrangementboth control distributors 221 and 222 and the working distributor 210are mounted on the same shaft as indicated by the dash and dot line.

It is assumed that the apparatus operates with closed circuit currentand that therefore the winding of the receiving magnet 215 is normallyenergized over the conductors a and b. rlhis may be accomplished, forinstance, by a remote switching-in operation through the subscrihersloop, by means of which both the driving motor of the apparatus and atthe same time the compressor for the production of the compressed airand suction air are also put into operation. Such devices and expedientsare conventional in this particular art, and their illustration istherefore omitted. In this manner the armature 216 is normally heldattracted by the magnet 215. In the normal position of rest shownsuper-atmospheric pressure is supplied to the coupling cylinder 223through the conduit 224, by way of supply conduit 213, bore 211 of slidevalve 214, conduit 225, distributor 210, and the conduit 224 so that adrive coupling (not shown) of the telegraph device connected to thepiston 226 of cylinder 223and by which coupling the distributor shaft isoperated-is released so that this shaft stops rotating. Sub-atmosphericpressure is supplied at that time to the cylinder 221, in which movesthe slide valve 214, by the control distributor 222 through the conduit220, the cylinder 221 being not supplied at that time withsuper-atmospheric pressure owing to the prevailing position of thecontrol distributor 221.

The sub-atmospheric pressure prevailing in the cylinder 221 is, however,not suflicient to cause the piston 214 to move to the left against theaction of the magnet 215. Gnly upon the reception of the startingimpulse-which in the case of closed circuit current operation is anocurrent impulsethe magnet 215 is deenergized and the armature 216 andpiston 214 are allowed to move to the left. In this manner the conduit212 communicates with the conduit 225 through the port 211 of the piston214 so that a subatmospheric pressure is supplied to the cylinder 223through the distributor 210 and the conduit 224, whereby the assumedcoupling between the distributor shaft and the power channel is closedby the piston 226, whereupon the three distributors 210, 221 and 222mounted on the common shaft begin to rotate. The ports of the severaldistributors are so displaced with respect to one another that the port228 rst communicates with the conduit 219 and the cylinder 221 would besupplied with super-atmospheric pressure if this conduit were not closedby the piston 214. Upon further rotation of the shaft. super-atmosphericpressure is supplied to the conduit 218 through the port 226 of thecontrol distributor 221, so that thepiston 214 turns to the right to itsposition of rest and the armature 216 engages again the magnet 215. Thedifferent effect of the supply of the compressed air through theconduits 218 and 219 is attained by the fact that the conduit 210 isconnected to the end wall and the conduit 219 to the cylindrical wall ofthe cylinder 221. The distributor 2|0 has also been in the meantimemoved out of its position of rest shown so that the conduit 224 and,therefore, the cylinder 223 are closed and continue to maintain asub-atmospheric pressure and the coupling is maintained in the operatingposition. Upon the further rotation of the distributors the port 229 ofthe control distributor 222 communicates with the cylinder 221 throughthe conduit 220. The cylinder 221 is supplied in the position of restwith sub-atmospheric pressure and tends to move the piston 2 I4 awayfrom the magnet 2 I 5.

If the magnet is reenergized in the meantime the piston remains in theright-hand, normal position, since the force of the magnet is greaterthan the force of the sub-atmospheric pressure. If the following impulseduring the starting is a current impulse, the control slide valve 2|4remains, therefore, in the position of rest, whereas upon the receptionof a no-current impulse the sub-atmospheric pressure prevailing in thecylinder 221 causes the piston 2|4 to return to the left-hand endposition, whereby the piston 2|4 closes the conduit 2|9 through whichsuperatmospheric pressure is supplied immediately following through theport 230 of the distributor 22|. The super-atmospheric pressure is,consequently, no longer effective. Shortly thereafter the port 230 isbrought into communication with the conduit 2|8 so thatsuper-atmospheric pressure is supplied to the cylinder 221, therebycausing the piston 2|4 to return to its position of rest. The time whichelapses between the connection of post 229 of the sub-atmosphericpressure control distributor 222 with the end of the cylinder 221through the conduit 220 and the connection of the port 230 of thesuper-atmospheric pressure control distributor 22| with the side wall ofthe cylinder 221 through the conduit 2I9 is the time during which themid-point scanning of the impulse is effected. By suitably varying thetiming of the ports of one distributor relatively to that of the otherdistributors the moment and the duration of the scanning may bedetermined. By suitably mounting the control distributors on the shaftthe displacement of the individual ports may be made adjustable and,therefore, the telegraph apparatus may be adapted to the distortion ofthe incoming telegraph impulses. The operation upon the energization ofthe magnet 2I5 by a current impulse corresponds to the operation in thecase of the reception of no-current impulse. The cylinder 221 issupplied with super-atmospheric pressure through port 230 and conduit2|9, immediately after the action of the sub-atmospheric pressure whichacted through the port 229 of the distributor 222 and the conduit 220,i. e., immediately after the mid-point scanning, so that an interruptionof the magnet current which now takes place can no longer cause arelease of the armature.

After the reception of an impulse the piston 2|4, depending upon thekind of the impulse, is therefore in one of its end positions. Suborsuper-atmospheric pressure is supplied, therefore, to the distributor2|0 through the conduit 225. At the next moment the distributor 2|0comes into communication with the port 205 thus bringing the iirstpiston of the cylinder into a corresponding position. As soon as theoperating distributor 2|0 has closed again the conduit 205,super-atmospheric pressure is again supplied to the conduit 2I6 and,therefore, to the cylinder 221 through the port 230 of the controldistributor 22|, so that the piston 2|4 to the right and is held therein position and the armature 2 I6 engages again the magnet 2l 5. Thisprocess repeats itself upon rotation of the distributors for allimpulses of a telegraph signal combination so that after a completerotation all pistons of the operating cylinder 20| are adjusted. Asalready above mentioned, instead of one common operating cylinder forthe rack bar operating pistons also five individual cylinders may beprovided which actuate selector bars. In this case the selector bars areadjusted after the distributor has made a complete rotation and theprinting of the signal may begin. The coupling is disengaged at themoment at which the only port of the distributor 2|0 reaches the portsfor the conduit 224 so that super-atmospheric pressure is again suppliedto the cylinder 226, since the distributor 2|0, owing to the blockingcurrent impulse, communicates with the pressure conduit 2|3. Theprinting of the signal may be effected in a known manner by a furtherpiston which is also controlled by the operating distributor 2|0.

While in Fig. 7 the control member is designed in the form of a pistonvalve 2|4, Fig. 8 shows an arrangement in which a pop valve control isemployed. For the sake of simplicity the revolving distributors areomitted in this figure, since they correspond substantially to thoseshown in Fig. 7.

In Fig. 8 the chamber 23| communicates continuously with thesub-atmospheric pressure side of the sub-atmospheric pressure generatorthrough the conduit 232, whereas the conduit 233 in the state of rest iskept open by the revolving distributors so that atmospheric pressureprevails therein. At the other end of the valve spindle 234 is mounted apiston 235 which at the same time is designed as an armature for thereceiving magnet 236. This piston 235 may be moved to- Wards the magnet236 by a compressed air impulse through the conduit 231. The supply ofair to the operating distributor (corresponding to 2|0 in Fig. '1) iscontrolled by the two valve discs 238 and 239 mounted on spindle 234.Compressed air and suction air is supplied respectively to the chambers240 and 24| through the conduits 242 and 243 by the pressure generatoras indicated by the signs -land Depending upon the position of the valvestem either the chamber 240 or 24| communicates with the central chamber244 so that the conduit 245 corresponding to the conduit 225 in Fig. 7and extending to the operating distributor is supplied with eithersuperor sub-atmospheric pressure.

At rest the valve is in the position shown. Upon the arrival of thestarting impulse the magnet 236 releases the armature 235 so that thevalve stem 234 together with the armature 235 moves to the right underthe influence of the pressure prevailing in the chamber 240, thismovement being supported, if desired, by a spring 246. Compressed air isthus supplied to the conduit 245, thereby releasing as is described withreference to Fig. I the assumed distributor shaft coupling. Thedistributors start and the control distributors first close the supplyconduit 233 and set up momentarily a pressure in the conduit 231,whereby the valve moves to the left. As soon as the valve disc 241engages the cylinder it is rmly held in position by the sub-atmosphericpressure through the conduit 232. The distributors are relatively timedin such a manner that in the interval corresponding to the mid-point ofthe rst telegraph impulse, the conduit 233 is momentarlly opened or lssupplied with super-atmospheric pressure so that the valve disc 241 nolonger adheres to the cylinder body. If, therefore, at this moment themagnet 236 is not energized the valve moves to the right and remainstemporarily in this position. In the meantime the working distributorhas caused the adjustment of the selector elements, for instance, of theilrst operating piston of the cylinder 20|, Fig. 7. Shortly thereafterthe conduit 245 is closed by the working distributor and the conduit 231receives a compressed air impulse through the compressed air distributorso that the valve returns to the position of rest and is ready toreceive the next telegraph impulse. This adjustment of the valve isrepeated for each telegraph impulse and after the adjustment of the ilveselector elements the printing and the locking of the coupling iseffected as described by reference to Fig. '7.

The invention is not limited to the embodiments shown. For instance, itis possible to use only one piston instead of a great number of pistons,in which case the individual impulses may be added or subtracted in thecylinder chamber depending upon the corresponding quantity of air. It isalso not necessary to employ a rotary distributor, but a slide valvecontrol may, for instance, be also used. Finally, it is immaterial inwhich sequence the pistons operate when employing a plurality of pistonssuch as in Fig. 1. It is preferable to operate rst the piston having thelongest stroke in order that its adjustment is properly completed at theend of the impulse combination in question.

The individual impulses may be allotted to the respective rotary and/orslide pistons in any desired manner. For instance, two piston systemsmay be provided which then control different movements of the part to beadjusted. A particularly advantageous form of the invention is obtainedif at least the ilrst and the last impulse is utilized by the samepiston system, since in this case the advantage is obtained that anoverlapping of the operating periods of the control members to beadjusted by the individual impulses is possible within the impulsecombination.

For certain telegraph codes it is also possible to cause the individualpistons to operate, for instance, in the manner that individual pistonseffect the shift of a group of characters (letter, number-shift, shiftbetween two groups of letters), whereas the other pistons select thecharacters within the type group.

I claim as my invention:

1. In a selector mechanism for translating electrically transmittedimpulse combinations, means for receiving an electric impulsecombination, positive and negative fluid pressure supply meanscontrolled by said receiving means to supply positive or negative fluidpressure in accordance with the character of the received signalimpulse, a selector responsive to said fluid pressures and a recordingdevice coupled to said selector, so that the latter moves the recordingcharacter of said device corresponding to a given received signalcombination into recording position, and a distributor connected betweensaid uid supply means and said selector for supplying successively fluidpressure impulses to said selector, and means connected with saidreceiver and controlled by the several electric impulse units of areceived signal combination for controlling the operation of saiddistributor to admit to said i selector a succession of iluid pressureimpulses of a direction and character corresponding to the character ofthe received signal impulses to produce the desired recording deviceposition as a result of the sum of the positive and negative selectormovements produced by the iluid impulses.

2. In a selector mechanism for translating electrically transmittedimpulse combinations, means for receiving an electric impulsecombination, positive and negative fluid pressure supply meanscontrolled by said receiving means to supply positive or negative fluidpressure in accordance with the character of the received signalimpulse, a selector responsive to said fluid pressures and having anumber of fluid operated pistons equal to the maximum number of impulsescontained in a signal impulse combination, and a recording deviceactuated by said pistons to move the recording character correspondingto a given received signal combination into recording position, and adistributor connected between said fluid supply means and said selectorfor supplying successively fluid pressure impulses to said selector, andmeans connected with said receiver and controlled by the severalelectric impulse units of a received signal combination for controllingthe operation of said distributor to admit to said selector a successionof fluid pressure impulses of a direction and character corresponding tothe character of the received signal impulses to produce the desiredrecording device position as a result of the sum of the positive andnegative selector piston movements produced by the fluid impulses.

3. In a selector mechanism for translating electrically transmittedimpulse combinations, means for receiving an electric impulsecombination, positive and negative fluid pressure supply meanscontrolled by said receiving means to supply positive or negative fluidpressure in accordance with the character of the received signalimpulse, a selector responsive to said iluid pressures and a recordingdevice coupled to said selector, so that the latter moves the recordingcharacter of said device corresponding to a given received signalcombination into recording position, and a distributor connected betweensaid fluid supply means and said selector for supplying successivelyfluid pressure impulses to said selector, said distributor having afluid supply port larger than its iiuid discharge ports so as totransmit only the mid-point portion of the fluid impulse with respect tothe total time period of its duration, and means connected with saidreceiver and controlled by the several electric impulse units of areceived signal combination for controlling the operation of saiddistributor to admit to said selector a succession of fluid pressureimpulses of a direction and character corresponding to the character ofthe received signal impulses to produce the desired recording deviceposition as a result of the sum of the positive and negative selectormovements produced by the fluid impulses.

4. In a selector mechanism for translating transmitted impulsecombinations, a recording device movable to present the desiredrecording character in accordance with the transmitted impulsecombination, a cylinder and a plurality of pistons movably disposedtherein and loosely coupled together so that each piston is movablerelatively to the adjoining piston a given number of path units, meansfor connecting the piston having the longest stroke to said recordingdevice so as to positively operate the latter, to present its differentconstituent characters, a

source of positive and negative fluid pressure, and a distributorcontrolled by the arriving signal combination for admitting successivelythe desired kind of pressure impulse between each of said pistons tomove the latter in the desired direction, so lthat the sum total of thepositive and negative piston movements represents the extent to whichsaid recording device is moved to present the desired recordingcharacter.

5. In a selector mechanism for translating transmitted impulsecombinations, a recording device movable to present the desiredrecording character in accordance with the transmitted impulsecombination, a cylinder and a plurality of pistons movably disposedtherein and loosely coupled together so that each piston is movablerelatively to the adjoining piston a given difierent number of pathunits, means for connecting the piston having the longest stroke to saidrecording device so as to positively operate the latter, to present itsdiierent constituent characters, a source of positive and negative fluidpressure, and a distributor controlled by the arriving signalcombination for admitting successively the desired kind of pressureimpulse between each of said pistons to move the latter in the desireddirection, so that the sum total of the positive and negative pistonmovements represents the extent to which said recording device is movedto present the desired recording character.

6. In a selector mechanism for translating transmitted impulsecombinations, a recording device movable to present the desiredrecording character in accordance with the transmitted impulsecombination, a cylinder and a plurality of pistons movably disposedtherein and loosely coupled together so `that each piston is movablerelatively to the adjoining piston a given different number of pathunits so that the strokes of the several pistons form a geometricalprogression, means for connecting the piston having the longest stroketo said recording device so as to positively operate the latter, topresent its'diierent constituent characters, a source of positive andnegative fluid pressure, and a distributor controlled by the arrivingsignal combination for admitting successively the desired kind ofpressure impulse between each of said pistons to move the latter in thedesired direction, so that the sum total of the positive and negativepiston movements represents the extent to which said recording device ismoved to present the desired recording character.

'7. In a selector mechanism for translating transmitted impulsecombinations, a recording device movable to present the desiredrecording character in accordance with the transmitted impulsecombination, a cylinder and a plurality of pistons movably disposedtherein and loosely coupled together so that each piston is movablerelatively to the adjoining piston a given different number of pathunits so that for a five-unit code one piston can traverse one half, asecond one fourth, a third one eighth, a four one sixteenth, and a fifthone thirty-secondth of the total stroke required to move the recordingdevice its maximum amount, means for connecting the piston having thelongest stroke to said recording device so as to positively operate thelatter, to present its diierent constituent characters, a source ofpositive and negative iiuid pressure, and a distributor controlled bythe arriving signal combination for admitting successively the desiredkind of pressure impulse between each of said pistons to move the latterin the desired direction, so that the sum total of the positive andnegative piston movements represents the extent to which said recordingdevice is moved to present the desired recording character.

8. In a selector mechanism for translating transmitted impulsecombinations, a recording device movable to present the desiredrecording character in accordance with the transmitted impulsecombination, a cylinder and a plurality of pistons movably disposedtherein and loosely coupled together so that each piston is movablerelatively to the adjoining piston a given number of path units, meansfor connecting the piston having the longest stroke to said recordingdevice so as to positively operate the latter, to present its differentconstituent characters, a source of positive and negative iiuidpressure, and a distributor controlled by the arriving signalcombination for admitting successively the desired kind of pressureimpulse between each of said pistons to move the latter in the desireddirection, so that the sum total of the positive and negative pistonmovements represents the extent to which said recording device is movedto present the desired recording character, said cylinder having a portbetween each adjacent pair of pistons, extending in the direction of thepiston stroke further than the stroke of the appertainlng piston, sothat each port remains always connected with the interstitial spacebetween the appertaining piston pair, each port being connected to adiierent iluid discharge port of said distributor.

9. In a selector mechanism for translating transmitted impulsecombinations, a recording device movable to present the desiredrecording character in accordance with the transmitted impulsecombination, a cylinder and a plurality of pistons longitudinallyslidingly disposed therein and loosely coupled together so that eachpiston is movable relatively to the adjoining piston a given number ofpath units, a piston rod for positively connecting the piston having thelongest stroke to said recording device to positively operate thelatter, to present its diierent constituent characters, a source ofpositive and negative uid pressure, and a distributor controlled by thearriving signal combination for admitting successively the desired kindof pressure impulse between each of said pistons to move the latter inthe desired direction, so that the sum total ot the positive andnegative piston movements represents the extent to which said recordingdevice is moved to present the desired recording character.

10. In a selector mechanism for translating transmitted impulsecombinations, a recording device movable to present the desiredrecording character in accordance with the transmitted impulsecombination, a cylinder, a stationary central axle disposed therein, aradial vane xed to the cylin 1er wall and extending therefrom closely tosaid axle and from end to end in said cylinder, and a plurality ofrotary vane pistons extending from end to end in said cylinder andjournalled to rotate on said axle and being loosely coupled together sothat each piston is movable relatively to the adjoining piston and tosaid radial vane a given number of rotary path units,

means for positively connecting the piston having the longest stroke tosaid recording device to positively operate the latter, to present itsdifferent constituent characters, a source of positive and negative uidpressure and a distributor n controlled by the arriving signalcombination for admitting successively the desired kind of pressureimpulse between each of said pistons to move the latter in the desireddirection, so that the sum total of the positive and negative pistonmovements represents the extent to which said recording device is movedto present the desired recording character.

11. In a selector mechanism for translating transmitted impulsecombinations, a recording device movable to present the desiredrecording character in accordance with the transmitted impulsecombination. a cylinder, a stationary central axle disposed therein, aradial vane xed to the cylinder wail and extending therefrom closely tosaid axle and from end to end in said cylinder, and a plurality ofrotary vane pistons extending from end to end in said cylinder andjournalled to rotate on said axle and being loosely coupled together sothat each piston is movable relatively to the adjoining piston and tosaid radial vane a given number of rotary path units, means forpositively connecting the piston having the longest stroke to saidrecording device to positively operate the latter, to present itsdifferent constituent characters, a source of positive and negativefluid pressure and a distributor controlled by the arriving signalcombination for admitting successively the desired kind of pressureimpulse between each of said pistons to move the latter in the desireddirection, so that the sum total of the positive and negative pistonmovements represents the extent to which said recording device is movedto present the desired recording character, and borings in said axle andsaid vane pistons for supplying the positive and negative fluid pressurebetween said pistons.

12. In a selector mechanism for translating transmitted impulsecombinations, a character drum having a plurality of peripheral groupsof signal characters and disposed to rotate and slide in axial directionto present the desired character to a given recording point, a cylinderand a plurality of pistons longitudinally slidingly disposed therein andloosely coupled together so that each piston is movable relatively tothe adjoining piston and to the cylinder end a given number of pathunits, a piston rod for positively connecting the piston having thelongest stroke to said character drum to positively shift the latter tobring its peripheral character group containing the desired characterinto registry with the recording point in accordance with a givenportion of the transmitted signal impulse combination, a second cylinderaxially alined with said first cylinder,a stationary central axledisposed in said second cylinder,a radial vane fixed to the cylinderwall and extending therefrom closelyto said axle and from end to end insaid cylinder, and a plurality of rotary vane pistons extending from endto end in said cylinder and journalled to rotate on said axle and beingloosely coupled together so that each .ane is movable relatively to theadjoining vane and to said fixed radial vane a given number of rotarypath units, means for slidingly coupling the vane having the longeststroke to said character drum to positively rotate the latter to bringthe desired character of the peripheral group selected by the pistons inthe first cylinder into registry with the recording point in accordancewith the remaining portion of the transmitted impulse combination, asource of positive and negative uid pressure and a distributor for eacho1' said cylinders controlled by the arriving impulse combination foradmitting to each cylinder successively the desired kind of pressureimpulse between each of said pistons to move the latter in the desireddirection, so that the total sum of the positive and negative pistonmovements in both cylinders represents the extent to which said drum ismoved to present the desired character to the recording point inaccordance with the total signal impulse cornbination.

13. In a selector mechanism for translating transmitted electric impulsecombinations, having an electric impulse receiver, a source of positiveand negative iluid pressure supply. a selector responsive to positiveand negative fluid pressure impulses, and a recording device coupled tosaid selector, so that the latter moves said device in accordance withthe selector response to said pressure impulses to present the desiredrecording character to a given recording point in accordance with thereceived electric impulse combination, a plurality of fluid pressuredistributors disposed to control the fluid supply to said selector, anda control element responsive to a received electric impulse forcontrolling the operation of said distributors in accordance with thereceived electric impulse combination, for supplying in accordance withthe relative distributor port positions fluid pressure impulses to saidselector only during the mid-time period of duration of each electricimpulse of the received impulse combination.

14. In a selector mechanism for translating transmitted electric impulsecombinations, having an electric impulse receiver, a source of positiveand negative fluid pressure supply, a selector responsive to positiveand negative iiuid pressure impulses, and a recording device coupled tosaid selector, so that the latter moves said device in accordance withthe selector response to said pressure impulses to present the desiredrecording character to a given recording point in accordance with thereceived electric impulse combination, a plurality of fluid pressuredistributors disposed to control the iiuid supply to said selector, anda control element responsive to a received electric impulse and actuatedby the varying positive and negative fluid pressure eects produced bysaid distributors, for controlling said distributors in accordance withthe received electric impulse combination, for supplying in accordancewith the relative distributor port positions fluid pressure impulses tosaid selector only during the mid-time period of duration of eachelectric impulse of the received impulse combination.

l5. In a selector mechanism for translating transmitted electric impulsecombinations, having an electric impulse receiver, a source of positiveand negative fluid pressure supply, a selector responsive to positiveand negative fluid pressure impulses, and a recording device coupled tosaid selector, so that the latter moves said device in accordance withthe selector response to said pressure impulses to present the desiredrecording character to a given recording point in accordance with thereceived electric impulse combination, a plurality of uid pressuredistributors disposed to control the fluid supply to said selector, anda control element responsive to a received electric impulse and actuatedby the varying positive and negative iluid pressure effects produced bysaid distributors, for controlling said distributors in accordance withthe received electric impulse combination, for supplying in accordancewith the relative distributor port positions fluid pressure impulses tosaid selector only during the mid-time period of duration of eachelectric impulse of the received impulse combination, `and portconnections between said distributors and said control element forreturning said element by fluid pressure impulses into its normalposition after each electric signal impulse is received.

16. In a selector mechanism for translating transmitted electric impulsecombinations, having an electric impulse receiver, a source of positiveand negative fluid pressure supply, a selector responsive to positiveand negative fluid pressure impulses, and a recording device coupled tosaid selector, so that the latter moves said device in accordance withthe selector response to said pressure impulses to present the desiredrecording character to a given recording point in accordance with thereceived electric impulse combination, a working fluid pressuredistributor disposed to control the fluid supply to said selector, afluid pressure control valve for said distributor controlled by saidelectric receiver and arranged to assume two operating positions tosupply either positive or negative fluid pressure to said workingdistributor, depending upon the operating condition of said receiver,two control distributors disposed to operate synchronously with saidworking distributor, one control distributor being directly connectedwith the positive and the other with the negative fluid pressure supply,and fluid conduit connections between said control distributors and saidcontrol valve for actuating said valve to assume the one or the other ofits two operating positions in accordance with the prevailing fluidpressure supply positions of said control distributors and subject tothe operating condition of said receiver.

17. In a selector mechanism according to claim 16, a fluid pressurecontrol valve comprising a cylinder and a sliding piston disposedtherein and connected to the electric receiver, the end of said cylinderbeing connected to either of the two control distributors so as to havepositive or negative fluid pressure supplied to it, and the peripheralcylinder wall portion along the piston stroke being connected with thepositive fluid pressure control distributor whereby according to thepositions of said distributors and the condition of said receiver saidpiston may be moved into one or the other of its two operating positionsto supply the desired kind of fluid pressure to the working distributorat the desired time moment.

18. In a selector mechanism according to claim 16, a pair of controldistributors mounted on a common shaft with the working distributor andbeing circumferentially adjustable relatively to one another and to theworking distributor for adjusting the timing of the fluid pressuresupply with respect to the occurrence of respective electric impulses.

19. In a selector mechanism according to claim 16, a fluid pressurecontrol valve comprising a cylinder having two end chambers connectedrespectively to the positive and a negative pressure controldistributor, a central delivery chamber connected to the workingdistributor and a supply chamber on either side of said central chamber,a valve rod passing through all of said chambers, said supply chambersbeing respectively connected with the positive and the negative fluidpressure supply and having ports connecting them with said deliverychamber, and valves in said delivery chamber fixed on said valve rod forcontrolling said ports so that when one port is open the other isclosed, a piston in the positive end chamber fixed on said valve rod andconnected with the operating element of the electric impulse receiver,and a valve disc mounted on said rod and disposed to cover the othernegative end chamber, and a spring tending to move said disc to opensaid chamber and to move the operating element of the receiver away fromthe latter and to supply positive fluid pressure to said workingdistributor, when the negative control distributor has permitted thenegative pressure to suiciently decrease after the reception of a signalimpulse, so that the delivery chamber is supplied with the desired fluidpressure only during the mid-time period of the duration of a signalimpulse.

FRANZ KLEMENT.

